摘要
利用1982～2000年37个测站的逐月气温、降水资料和归一化植被指数资料,采用奇异值分解(SVD)技术,分析了长江中游地区前期植被覆盖变化对夏季气温、降水的影响。结果表明,长江中游地区植被指数、夏季平均气温和降水量在1982～2000年呈上升趋势,年际波动变化明显;上年冬季NDVI同当年夏季气温、降水的相关最显著;江汉平原、洞庭湖平原及附近地区的冬季NDVI变化对湖北、湖南的夏季气温、降水影响最大,受前期冬季NDVI变化影响最大的区域位于湖北东部。
Based on the NDVI （normalized difference vegetation index） data and the monthly temperature as well as the precipitation from 37 observational stations from 1982 to 2000, the effects of the preceding vegetation cover change on the summer temperature and precipitation in the mid-reaches of Yangtze River were analyzed by using the Singular Value Decomposition （SVD） technique. The results showed that the annual NDVI and the annual summer temperature and precipitation from 1982 to 2000 increased, and interannual fluctuation changed significantly. There was significant correlation between the temperature and precipitation of current summer and the NDVI of the previous winter, The key areas which affected the summer temperature and precipitation were the Two Lake plain and its nearby regions, while the eastern region of Hubei was the most sensitive to the NDVI in previous winter.
出处
《安徽农业科学》
CAS
北大核心
2008年第17期7344-7347,7448,共5页
Journal of Anhui Agricultural Sciences
基金
江苏省"青蓝工程"资助项目
